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Diffstat (limited to 'hl/examples/ex_table_02.c')
-rw-r--r-- | hl/examples/ex_table_02.c | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/hl/examples/ex_table_02.c b/hl/examples/ex_table_02.c new file mode 100644 index 0000000..16cf33e --- /dev/null +++ b/hl/examples/ex_table_02.c @@ -0,0 +1,127 @@ +/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * + * Copyright by the Board of Trustees of the University of Illinois. * + * All rights reserved. * + * * + * This file is part of HDF5. The full HDF5 copyright notice, including * + * terms governing use, modification, and redistribution, is contained in * + * the files COPYING and Copyright.html. COPYING can be found at the root * + * of the source code distribution tree; Copyright.html can be found at the * + * root level of an installed copy of the electronic HDF5 document set and * + * is linked from the top-level documents page. It can also be found at * + * http://hdf.ncsa.uiuc.edu/HDF5/doc/Copyright.html. If you do not have * + * access to either file, you may request a copy from hdfhelp@ncsa.uiuc.edu. * + * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ + +#include "H5TB.h" +#include <stdlib.h> + +/*------------------------------------------------------------------------- + * Table API example + * + * H5TBappend_records + * + *------------------------------------------------------------------------- + */ + +#define NFIELDS (hsize_t) 5 +#define NRECORDS (hsize_t) 8 +#define NRECORDS_ADD (hsize_t) 2 +#define TABLE_NAME "table" + +int main( void ) +{ + typedef struct Particle + { + char name[16]; + int lati; + int longi; + float pressure; + double temperature; + } Particle; + + Particle dst_buf[NRECORDS+NRECORDS_ADD]; + +/* Define an array of Particles */ + Particle p_data[NRECORDS] = { + {"zero",0,0, 0.0f, 0.0}, + {"one",10,10, 1.0f, 10.0}, + {"two", 20,20, 2.0f, 20.0}, + {"three",30,30, 3.0f, 30.0}, + {"four", 40,40, 4.0f, 40.0}, + {"five", 50,50, 5.0f, 50.0}, + {"six", 60,60, 6.0f, 60.0}, + {"seven",70,70, 7.0f, 70.0} + }; + + /* Calculate the size and the offsets of our struct members in memory */ + size_t dst_size = sizeof( Particle ); + size_t dst_offset[NFIELDS] = { HOFFSET( Particle, name ), + HOFFSET( Particle, lati ), + HOFFSET( Particle, longi ), + HOFFSET( Particle, pressure ), + HOFFSET( Particle, temperature )}; + + size_t dst_sizes[NFIELDS] = { sizeof( p_data[0].name), + sizeof( p_data[0].lati), + sizeof( p_data[0].longi), + sizeof( p_data[0].pressure), + sizeof( p_data[0].temperature)}; + + /* Define field information */ + const char *field_names[NFIELDS] = + { "Name","Latitude", "Longitude", "Pressure", "Temperature" }; + hid_t field_type[NFIELDS]; + hid_t string_type; + hid_t file_id; + hsize_t chunk_size = 10; + int *fill_data = NULL; + int compress = 0; + herr_t status; + int i; + + /* Append particles */ + Particle particle_in[ NRECORDS_ADD ] = + {{ "eight",80,80, 8.0f, 80.0}, + {"nine",90,90, 9.0f, 90.0} }; + + /* Initialize the field field_type */ + string_type = H5Tcopy( H5T_C_S1 ); + H5Tset_size( string_type, 16 ); + field_type[0] = string_type; + field_type[1] = H5T_NATIVE_INT; + field_type[2] = H5T_NATIVE_INT; + field_type[3] = H5T_NATIVE_FLOAT; + field_type[4] = H5T_NATIVE_DOUBLE; + + /* Create a new file using default properties. */ + file_id = H5Fcreate( "ex_table_02.h5", H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT ); + + /* make a table */ + status=H5TBmake_table( "Table Title",file_id,TABLE_NAME,NFIELDS,NRECORDS, + dst_size, field_names, dst_offset, field_type, + chunk_size, fill_data, compress, p_data ); + + /* append two records */ + status=H5TBappend_records(file_id, TABLE_NAME,NRECORDS_ADD, dst_size, dst_offset, dst_sizes, + &particle_in ); + + /* read the table */ + status=H5TBread_table( file_id, TABLE_NAME, dst_size, dst_offset, dst_sizes, dst_buf ); + + /* print it by rows */ + for (i=0; i<NRECORDS+NRECORDS_ADD; i++) { + printf ("%-5s %-5d %-5d %-5f %-5f", + dst_buf[i].name, + dst_buf[i].lati, + dst_buf[i].longi, + dst_buf[i].pressure, + dst_buf[i].temperature); + printf ("\n"); + } + + /* Close the file. */ + H5Fclose( file_id ); + + return 0; +} + |